>> muni paid more overtime than the fire department and police department in san francisco last year. they went $18 million over their budget. get this, some employees took home more man $100,000 in overtime pay alone. an overhaul of the train control system was needed to make service more streamlined and reliable. the overnight work and double shifts by a few specialized employees let some get double overtime, doubling their salaries. >> it is requires you work a full day and then a full night. it is hard work. it is something that has to be done. >> one mechanic logged 1,954 hours of overtime at $83.85 an hour. with $163,000 in overtime the base salary of $106,000 jumped to $293,000.